Oh, sure, I enjoy Dick Feynman's ribbing as much as the next fellow, but around here we take this experiment plenty serious.

GRAVES: Right. Sorry.

SLOTIN: As a matter of fact, after I'm through giving you the laboratory tour, I need to run the critical assembly test on this Pu core we're sending out to Bikini for the test shot.

CIESLICKI: But Dr. Slotin, we've already tested it.

SLOTIN: Sure, we've tested it, Cieslicki. But have we tested it enough? Do we really want to run the risk of a mishap? I think our men in uniform, not to mention the American citizens, deserve better than that. Don't you?

CIESLICKI: Yes, sir.

GRAVES: I'd like to see the test if I may. I should learn this procedure if I'm going to be taking over.

(Slotin assembles the experiment much as he did in the first scene. The indicators begin to click and flash relatively slowly and steadily. Slotin moves the top shell back and forth a few inches above the core.)